Soot-blower element



subject to high temperatures Patented Oct. 4, l

UNITED STATES PATENT OFFICE.

NORMAN L. SNOW,

' This invention rela of blower elements of soot-blowers.

OF HARTFORD, CONNECTICUT.

SOOT-BLOWER ELEMENT.

Application filed October 10, 1921.

tes to the construction These elements commonly consist of tubularheaders or pipes provided with length, and they are arzlefsalong theirranged across or ad steam boilers 1n such be rotated to direct jetsdischarge nozacent to the tubes of manner that they may of steamadmitted to the blower elementonto the boiler tubes ash to remove soot,

of the fuel combustion therefrom.

kindred products and I In the prior structures the header pipes areusually each provided with a single row of holes,

and nipple-like nozzles are screwed, headed or welded therein toAlthough such holes direct the steam jets. and their individual nozzlesoccasionally occur at diametrically opposite points, connection but arecleamng purposes.

they have no structural so located for particular Blower elements, beingby the flames andgases of combustion from the furnace,

are liable to warp,

twist and deteriorate in such, manner that they cannot be easilyrotated, and. sothatth e nozzles are loosened and drop out therebygreatly diminishing the force and effect of the steam-jets issuing fromthe holes.

The object of the present invention is to provide ablowerelement of thisnature but with combined struts structed and secured and strengthen theheader pipe, and will notloosen or drop out under the influence of heat.This object is andnozzles so conthat they willv stiffen attained byforming diametrically opposite holes in the header pipe, preferably ofequal size so as to equalize expansion strains,

therein strut-s which across the interior of the pipe,

formed in one or both having et-nozzles and in assembling extenddiametrically said struts ends thereof, thus strengthening the pipeagainst warpage and effectually preventing dislocation of the nozzlesowing to their mechanical fastening the pipe.

In the accompanying drawings, Fig. 1

shows a section or" a soot blower element vention. Fig. Qon a on.opposite sides of boiler provided with a that embodies the insectionof: a blower pipe and a combined strut and nozzle constructed anddescribed. Fig. 3 is .a tubular strut-nozz secured as a' similar sectionwith le of modified torme larger scale, shows a Serial no; 506,767.

Fig. '4: shows another form of tubular strutno'zzlesecured according to'the present invention. Fig. 5 showsanother modification.

For the purpose'of illustrating the use of the improved blower element,it is shown in connection with a water tube boiler in which the blowerelement'is arranged to extend across the water tubes 1 that aresupportedbelow the steamv chambers 2 within the boiler 'setting 3 in theusual manner. The blower element consists of a header pipe l that issupported within the boiler setting in bearings mounted on some of thewater tubes and that extends through one wall of the setting; on theoutside the header is provided with means 5 through which steam may beadmitted and with means 6 bywhich th element may be rotated. The blowerpipe 4 has a series of diametrically opposite holes spaced at'suitableintervals along its length.

The struts 7 extend across the interiorof' the pipe through theseholesand are enlarged at each endor otherwise secured to the pipe. A .jetthrowing nozzle maybe formed at one, end of the strut as shown in Figs.3 and 5 or atbo th'ends" as shown in Figs. 2 and 4:. Such nozzles may bestraight as shown in Fig i or theyfm ay be 'flaredas showninFi gs.2,3and 5 to form a diverging path of discharge. i I Openings 8 are madethrougl the struts near the middle of their length for the passage otsteam from the header pipe into the nozzles,;which openingsmay be of anydesiredsize or shape as indicated in the several figures.v v In allcases the struts pass across from one side of the blower pipe to theother and are headed over at their ends or otherwise positively fastenedto the pipe in such manner as to prevent them from loosening. The

symmetrical perforation of the blower pipe tends balance and neutralizethe. expansion or contraction strains of heating thereby ference mayexist due to one side of the element being more highly heated than theother as it lies idle in the boiler. For example, the bottom of theelement may be subjected to direct impingement of the flame, thusproducing a higher temperature in the bottom wall of the pipe. Whensteam is admitted to the blower element in the normal operation of thesame, condensate is frequently carried in with the steam and broughtinto contact with parts of the blower walls. The parts with which thewater contacts are subjected to a greater chilling effect than thoseparts with which the steam alone contacts, thus causing an unequalcooling.

If one portion of a blower element is heated to a different temperaturethan the other portion, it is obvious that unequal expansion orcontraction results, thus leading to warpage of the blower pipe. It isobvious that the use of the diametral struts as herein described resiststhis differential expansion or contraction and thus resists warpage ofthe element. If one side of the blower pipe tends to expand or contractahead of the other, the action of the strut is such as to resist thistendency.

The invention claimed is:

1. In a boiler cleaner, a soot blower element adapted to be positionedwithin a boiler setting-for discharging a jet of cleaning fluid adjacentparts of the boiler to be cleaned, said element comprising a pipe formedwithan opening, means for conducting a cleaning fluid to said element,and a member engaged in said opening and having a portion thereofprovided with a passage Cadapted to conduct the cleaning fluid fromwithin the element for discharge laterally of the element through saidopening, said memher being also formed with a second portion engageable'with said element, said portions of said member cooperating to reslstdlstortion of the element under the influence of .temperaturediflerences, said second portion extending substantially in the oppositedirection from said first portion,and also provided with a passageadapted to conduct cleaning fluid from within the element for dischargelaterally thereof.

2. In a boiler cleaner, a soot blower element comprising a pipe adaptedto be positioned within the boiler setting and provided withdiametrically opposite openings at in- ,tervals along its length,diametral struts passing through the tube and secured in said holes forresisting distortion of said element under the influence of temperaturedifferences, said struts having passages respectively for conductingcleaning fluid from within the element for discharge laterally thereof.

3. In a boiler cleaner, a soot blower element comprising a pipe adaptedto be positioned within the boiler setting and provided withdiametrically opposite openings at intervals along its length, diametralstruts passing through the tube and secured in said holes for resistingdistortion of said element under the influence of temperaturedifferences, said struts having passages respectively for conductingcleaning fluid from within the element for discharge laterally thereof,through said diametrical opposite openings.

4-. In a boiler cleaner, a soot blower element comprising a pipe adaptedto be positioned within the boiler setting, a strut for resistingdistortion of said element under the influence of temperaturedifferences, said strut also forming a nozzle for discharging cleaningfluid in diametrically opposite directions and having a passage foradmission of a cleaning fluid thereto.

5. A soot blower element comprising a pipe with a plurality of pairs ofoppositely disposed openings spaced along its length, and a plurality ofnozzle forming members, each engaged in a pair of said openings, theopposite ends of said members being spread laterally intoengagement-with the outer surface of said element. V

6. A soot blower. element comprising a pipe provided with a pair ofoppositely dis: posed. openings, and a nozzle forming mem- 95 herhaving'ends engaged in said openings respectively, said member beingprovided with means for conductinga cleaning fluid from within theelement for discharge laterally thereof through said openings. 7 100 7.A soot blower element comprising a pipe having pairs of oppositelydisposed holes at intervals along its'length, nozzle forming membersextending across the pipe through said holes and enlarged on the outerends for securing engagement. with the pipe about said holes.

8. A soot blower element comprising a pipe, said pipe being providedwith a pair of oppositely disposed holes, and a nozzle forming memberextending across the pipe and terminating in enlarged heads fixed in thesaid oppositely disposed holes.

9. A soot blower element comprising a pipe, said pipe being providedwith a. pair of oppositely disposed holes. and a nozzle forming memberextending across the pipe and terminating in enlarged heads fixed in thesaid onpositelv disposed holes on the tending across the pipe andthrough the opposite walls thereof and each having provision fordischarging cleaning fluid jets in substantially opposite directions.

11. The combination with a sootblower element, of a plurality of spacednozzles 1 mounted in said element and each having a soot blower element,and having a cleanan inlet within said element and flaring from ingfluid inlet intermediate said portions, said inlet to its outlet andeach of said and means for conducting a cleaning fluid nozzles'alsohaving portions engageable with from said inlet laterally of the elementin the opposite Walls of the element for resistopposite directions fordischarge through ing distortion of the element. said first namedportions of the nozzle mem- 12. A nozzle forming member having her.portions engageahle with opposite Walls of NORMAN L. SNOW.

